Bowers & Wilkins ASW 12CM Speaker User Manual

ortrayal, and one more satisfying in the long term, is
to be had by setting the subwoofer level lower than
he standard calibration level.
-channel Audio
et the system up in the preferred position and play
some programme with a steady bass content.
The optimum settings of the PHASE switch and the
OW-PASS FREQ control are inter-related and also
ependent on the low-frequency cut-off characteristic
of the satellite speakers. However, the settings
ecommended above for the LOW PASS FREQ control
and PHASE switch have been chosen to integrate well
ith most satellite speaker bass alignments.
Using the initial settings, first check the setting of the
PHASE switch. Choose the option that gives the fullest
ound. Normally the recommended option will be
optimum, but may not be in certain circumstances.
These may be that the power amplifiers feeding the
satellite speakers invert the signal or that the
subwoofer is not placed close to the satellite speakers.
Next, adjust the VOLUME (LINE or SPEAKER) of the
subwoofer relative to the satellite systems to your
liking. Use a wide variety of programme material to get
an average setting. A setting that sounds impressive
on one piece may sound overpowering on another.
Listen at a realistic volume level as the perception of
musical balance varies with sound level.
Finally, adjust the LOW-PASS FREQ control to give the
smoothest transition between the subwoofer and
satellite speakers.
All Applications
The BASS EXTENSION switch offers three options of
subwoofer bass extension. Position A gives the
greatest extension and position C gives the least
extension. Position B provides a compromise setting.
If the system is to be used at very high volume levels
or in a large listening room, restricting the bass
extension by selecting either B or C may help ensure
that the subwoofer is not asked to exceed its
performance limits. In most situations the BASS
EXTENSION switch should be left in position A.
The EQ switch alters the subwoofer bass roll-off
alignment. The bass you hear is a combination of the
subwoofer plus the effects of the room and you should
choose the position that best complements your room
and the location of the subwoofer. Position A gives a
“drier” alignment, more suited to placing the
subwoofer in a corner or compensating for a resonant
room. Position B is suited to a less resonant room
acoustic and use away from a corner.
If you get pr
oblems with uneven bass – certain bass
notes are exaggerated more than others – then you
probably have a room interface problem and it is worth
experimenting with the location of the subwoofer
What may seem like small changes in position – 15cm
(6in) or so – can have a profound effect on the sound.
The use of multiple subwoofers can smooth the
effects of room resonances, as each subwoofer will
tend to excite r
esonances at different frequencies. If
you appreciably alter the relative distances from the
ubwoofer(s) and satellite speakers to the listening
position, re-assess the PHASE switch setting. You
hould also check the volume of the subwoofer (using
either the processor output levels or the VOLUME
ontrol on the subwoofer amplifier as appropriate), but
nly after setting the phase correctly.
he cabinet surfaces usually only require dusting. If
ou wish to use an aerosol or other cleaner, remove
the grille first by gently pulling it away from the
abinet. Spray aerosols onto the cleaning cloth, not
directly onto the product. Test a small area first, as
some cleaning products may damage some of the
urfaces. Avoid products that are abrasive, or contain
acid, alkali or anti-bacterial agents. Do not use
leaning agents on the drive unit. The grille fabric may
be cleaned with a normal clothes brush whilst the
grille is detached from the cabinet. Avoid touching the
drive unit, as damage may result. Switch off the
subwoofer before cleaning.
We have chosen the finest wood veneers for the
surface of the cabinet, but please be aware that, like
all natural materials, the veneer will respond to its
environment. Keep the product away from sources of
direct heat such as radiators and warm air vents to
avoid the risk of cracking. The wood is treated with an
ultra-violet resistant lacquer to minimise changes in
colour over time, but a degree of change is to be
expected. This effect may be particularly noticeable
where the area covered by the grille, or areas kept in
shadow, change more slowly than other areas. Colour
differences may be rectified by exposing all the veneer
surfaces equally and evenly to sunlight until the colour
is uniform. This process can take several days or even
weeks, but may be accelerated by careful use of an
ultra-violet lamp.
Do not use the subwoofer as a table. When in use,
objects left on top of the subwoofer are liable to rattle.
In particular, avoid the risk of liquids being spilled (e.g.
from drinks or vases of flowers).
If the system is taken out of use for a long period,
disconnect the subwoofer from the mains supply.
Limited Warranty
This product has been designed and manufactured to
the highest quality standards. However, if something
does go wrong with this product, B&W Group Ltd. and
its national distributors warrant fr
ee of charge labour
(exclusion may apply) and replacement parts in any
country served by an official B&W distributor.
This limited warranty is valid for a period of five years
om the date of pur
chase or two years for electr
including amplified loudspeakers.
erms and Conditions
The warranty is limited to the repair of the
equipment. Neither transportation, nor any other
costs, nor any risk for r
emoval, transportation and
installation of products is covered by this warranty.
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